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Synthesis of hydrophobic trimethoxybenzene-formaldehyde gels - controlling the microstructure

Anklam, Thomas and Milow, Barbara and Tannert, René (2023) Synthesis of hydrophobic trimethoxybenzene-formaldehyde gels - controlling the microstructure. 2nd International Conference on Aerogel Inspired Materials, 2023-09-27 - 2023-09-29, San Sebastian, Spanien.

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Aerogels based on phenolics (such as resorcinol-formaldehyde, RF) are receiving increasing attention due to their remarkable thermal insulating and lightweight properties that can be traced back to their unique microstructure (including high open porosity and low density).[1] While structure and, thus, properties of these organic aerogels are typically tuned by controlling parameters such as the monomer concentrations, temperature, type of catalyst and pH-value, the influence of the solvent on gelation is only scarcely exploited.[2] Especially, the pH-value is important to tune the microstructures and, therefore, also the surface characteristics of RF by modifying the relative kinetics of addition and condensation reactions during gelation.[3] We recently developed trimethoxybenzene-formaldehyde (TMBF) aerogels as hydrophobic analog of RF.[4] Here, we report on their synthesis and characterization by chromatographic (HPLC), scattering (DLS), spectroscopic (ATR-IR, NMR) methods as well as pycnometry, sorption analysis and electron microscopy. The influence of the nature of the solvent on the microstructure of the resulting gels is demonstrated. While resembling RF aerogels in many ways, TMBF aerogels show remarkably different wetting behavior. [1] X. Lu, M. C. Arduini-Schuster, J. Kuhn, O. Nilsson, J. Fricke, R. W. Pekala, Science 1992, 255, 971-972. [2] A. M. ElKhatat, S. A. Al-Muhtaseb, Adv. Mater. 2011, 23, 2887-2903. [3] K. Barral, J. Non-Cryst. Solids 1998, 225, 46-50. [4] T. Anklam, C. Farès, R. Tannert, in 7th International Conference on Multifunctional, Hybrid and Nanomaterials (Eds.: M. Antonietti, C. Sanchez, R. Xu), Elsevier, Genova, Italy, 2022.

Item URL in elib:https://elib.dlr.de/198164/
Document Type:Conference or Workshop Item (Speech)
Title:Synthesis of hydrophobic trimethoxybenzene-formaldehyde gels - controlling the microstructure
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Anklam, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-3192-907XUNSPECIFIED
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728UNSPECIFIED
Tannert, RenéUNSPECIFIEDhttps://orcid.org/0000-0001-9484-8886UNSPECIFIED
Date:29 September 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Aerogel, Hydrophobic, Phenolic Ether, Microstructure, Solvent, Tuning, Contact Angle, BET surface area, SEM
Event Title:2nd International Conference on Aerogel Inspired Materials
Event Location:San Sebastian, Spanien
Event Type:international Conference
Event Start Date:27 September 2023
Event End Date:29 September 2023
Organizer:University of the Basque Country, Institute for Polymer Materials (POLYMAT)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Anklam, Thomas
Deposited On:19 Oct 2023 07:54
Last Modified:24 Apr 2024 20:58

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